There are two shops in Brooklyn/Queens: Sew Right (223-20 Union Turnpike Oakland Gardens, NY 11364
(718) 468-5858) and Sew Time Creative Sewing Center (78-35B Springfield Blvd, Bayside, NY (718) 776-1900)
These two store are with in one block of each other. They are dealers for Janome, Phaff, Babylock plus they sell many other brands.
Also City Quilter is the Bernia dealer in NYC. All three stores let you try out the machines and offer classes. I have been to all 3 stores store and Sew Right is the better one in the Brooklyn/Queens area. If you want a Bernia City Quilter has a sale every year on the Bernia's they use in the classroom.